<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeLeave" @tab-click="tabClick">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_weight">
              <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 循环表单的item项 -->
            <el-form-item :label="item.attr_name" v-for="(item) in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="ele" v-for="(ele,index) in item.attr_vals" :key="index" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <!-- 循环表单的item项 -->
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 文件上传 -->
            <!-- action：文件上传的路径 -->
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>

            <el-button type="primary" style="margin-top:15px" @click="addGoods">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>

    </el-card>

    <!-- 预览图片的对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewDialogVisible" width="50%">
      <img :src="previewPath" alt="" style="width:100%">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      // 所有分类数据
      cateList: [],
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: '0',
        goods_number: '0',
        goods_weight: '0',
        // 级联选择器变化所绑定的数组
        goods_cat: [],
        // 文件路径
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        // 商品的参数（数组）
        attrs: []
      },
      // 添加商品的表单验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 级联选择的配置选项
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        expandTrigger: 'hover'
      },
      // 动态参数的表单数据
      manyTableData: [],
      // 静态属性的表单数据
      onlyTableData: [],
      // 上传路径
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 文件上传是使用的自定义ajax需要携带请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览文件的路径
      previewPath: '',
      // 图片预览对话框显示属性
      previewDialogVisible: false
    }
  },
  mounted() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取分类列表失败')
      }
      this.cateList = res.data
      // console.log(this.cateList)
    },
    // 级联选择器发生改变触发的函数
    handleChange() {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 离开当天标签页触发的函数
    beforeLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是：' + oldActiveName)
      // console.log('即将进入的标签页名字是：' + activeName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    // tab 被选中时触发
    async tabClick() {
      // console.log(this.activeIndex)
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数失败')
        }
        // console.log(res)
        res.data.forEach((ele) => {
          ele.attr_vals =
            ele.attr_vals.length === 0 ? [] : ele.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        // 证明访问的是静态属性面板
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败')
        }
        // console.log(res)
        this.onlyTableData = res.data
        console.log(this.onlyTableData)
      }
    },
    // 预览事件
    handlePreview(file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    // 删除事件
    handleRemove(file) {
      // console.log(file)
      // 1. 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2. 从 pics 数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((ele) => ele.pic === filePath)
      // 3. 调用数组的 splice 方法，把图片信息对象，从 pics 数组中移除
      this.addForm.pics.splice(i, 1)
    },
    // 上床成功的函数
    handleSuccess(response) {
      // console.log(response)
      // 1. 拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2. 将图片信息对象，push 到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    // 添加商品
    addGoods() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单数据')
        }
        // 执行添加业务
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })

        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })

        form.attrs = this.addForm.attrs
        console.log(form)
        // 发起请求添加商品
        // 商品的名称，必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
</style>
